Răspuns :
a+a+1+a+2+a+3+a+4=1230
5a+10=1230
5a=1220
a=1220:5
a=244
nr sunt 244,245,246,247,248
5a+10=1230
5a=1220
a=1220:5
a=244
nr sunt 244,245,246,247,248
x+x+1+x+2+x+3+x+4=1230 5x+10=1230 5x=1230-10 5x=1220 x= 1220:5 x=225 nr sunt 244 245 246 247 248